Organization and Basis of Presentation - Contract and Contract-Related Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Revenue from External Customer [Line Items]
Contract related liabilities	$ 60,286	$ 71,248
Outstanding gaming chips and slot tickets liability
Revenue from External Customer [Line Items]
Contract related liabilities	6,856	7,968
Loyalty points deferred revenue liability
Revenue from External Customer [Line Items]
Contract related liabilities	35,390	40,968
Patron advances and other liability
Revenue from External Customer [Line Items]
Contract related liabilities	$ 18,040	$ 22,312